A range hood

Abstract

The present invention discloses a range hood, comprising a shell, an upper panel fixedly arranged at the front side of the shell, and a lower panel assembly movably arranged at the front side of the shell, characterized in that an air inlet is formed at the front side of the shell and below the upper panel, the lower panel assembly can be in a first position and a second position reached from the first position by translation and rotation, when the lower panel assembly is in the first position, the air inlet is closed by the lower panel assembly, and when the lower panel assembly is in the second position, the air inlet is opened. Compared with the prior art, the present invention has the advantages that by placing the air inlet downward, it is closer to the smoke source, the negative pressure attenuation is less, and the smoking effect can be greatly improved.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a range hood. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Range hoods work based on the principle of fluid dynamics. A centrifugal fan installed inside the range hood absorbs and exhausts oil fumes, and uses a filter to filter out some grease particles. The centrifugal fan includes a volute, an impeller installed in the volute, and a motor that drives the impeller to rotate. When the impeller rotates, negative pressure suction is generated at the center of the fan, sucking the oil fumes under the range hood into the fan. After being accelerated by the fan, the fumes are collected by the volute and guided to be discharged outdoors.

[0003] Existing side-suction range hoods usually have an air inlet on the panel. In order to prevent the air inlet from being exposed and not aesthetically pleasing when the range hood is not working, and to prevent the backflow of oil smoke, a smoke baffle is provided at the air inlet, which can also collect smoke when the range hood is working. For example, a Chinese patent application numbered 201721592791.7 discloses a hanging and fixing structure of a smoke baffle for a range hood, which mainly includes a range hood body and a smoke baffle. A smoke collecting hood is provided on the range hood body, a smoke collecting chamber is provided on the smoke collecting hood, and a smoke baffle assembly is provided in the middle of the smoke collecting chamber. The smoke baffle assembly includes an upper fixed component and a lower detachable component. The fixed component is a control area, and the detachable component is a smoke baffle.

[0004] This type of range hood only has the smoke baffle open when in operation, which severely reduces the air inlet area, resulting in poor smoke extraction, and the smoke easily escapes along the lower panel. In addition, the upper panel is generally flipped, and the smoke inlet is on the upper side of the cabinet, so the smoke rising process has a long path, and when the smoke hits the lower panel, it is easy to cause smoke to escape on both sides.

[0005] Moreover, the volute assembly is arranged in the middle of the main body, and the air inlet is strip-shaped and located in the middle position of the front side of the main body. This makes the wind speed in the middle part of the air inlet faster and generates greater noise, while the wind speed on both sides of the air inlet is slower because it is far away from the volute assembly. As a result, during cooking, the wind speed on both sides is not enough to capture the rising oil smoke, causing the oil smoke to escape from both sides of the range hood.

[0006] In addition, the fan is set directly opposite the air inlet and lacks a smoke collection chamber, so the effect of gathering oil smoke cannot be achieved; the lighting lamps are generally installed on the left and right side panels of the box or on the fixed lower panel. The light of this installation structure will shine directly into the eyes, causing glare problems, and the smoke baffle is not light-transmitting, which will block the line of sight and is not conducive to improving the cooking experience. Summary of the invention

[0007] The first technical problem to be solved by the present invention is to provide a range hood that can lower and enlarge the air inlet to improve the fume extraction effect in view of the deficiencies in the above-mentioned prior art.

[0008] The second technical problem to be solved by the present invention is to avoid direct illumination of the user while providing a better lighting effect.

[0009] The third technical problem to be solved by the present invention is to move the negative pressure area outwards, while reducing the flow loss of the oil fume airflow and reducing noise.

[0010] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: a range hood, comprising a shell, an upper panel fixedly arranged on the front side of the shell, and a lower panel assembly movably arranged on the front side of the shell, characterized in that: an air inlet is formed on the front side of the shell and below the upper panel, and the lower panel assembly can be in a first position and a second position reached from the first position by translation and rotation; when the lower panel assembly is in the first position, the air inlet is closed by the lower panel assembly, and when the lower panel assembly is in the second position, the air inlet is opened.

[0011] According to one aspect of the present invention, in order to improve the smoke-collecting effect, the second position of the lower panel assembly is located at the front side of the upper panel.

[0012] In order to facilitate the operation of the control buttons, a power button is arranged on the upper panel, and a function button is arranged on the lower panel assembly, thereby forming a double-control switch structure.

[0013] To facilitate guiding the oil smoke flow into the shell, the lower panel assembly includes a lower panel matching the air inlet and a first baffle. When the lower panel assembly is in the second position, the first baffle extends from the lower end of the lower panel toward one side inside the shell toward the inside of the shell.

[0014] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: an illuminating lamp is arranged on the first baffle.

[0015] The technical solution adopted by the present invention to solve the above-mentioned third technical problem is as follows: a fan frame is arranged above the shell, a fan system is arranged in the fan frame, and when the lower panel assembly is in the second position, it is located in front of the shell; an oil guide plate assembly is arranged in the shell for allowing oil smoke entering from the air inlet to pass through, and the oil guide plate assembly includes a first oil guide plate extending backward from the front side of the shell, located above the air inlet, and a second oil guide plate extending downward from the rear end of the first oil guide plate; when the lower panel assembly is in the second position, the space between the oil guide plate assembly, the shell and the lower panel assembly constitutes an external cavity for collecting smoke.

[0016] In order to facilitate the introduction of oil smoke with a faster rising speed into the shell, the lower panel assembly includes a lower panel matching the air inlet and a first baffle. When the lower panel assembly is in the second position, the first baffle extends from the lower end of the lower panel toward one side inside the shell toward the inside of the shell.

[0017] In order to facilitate the introduction of oil smoke with a faster rising speed into the shell, it is more preferred that when the lower panel assembly is in the second position, the first baffle extends gradually upward from the lower end of the lower panel toward one side of the shell toward the inside of the shell from front to back.

[0018] To facilitate the passage of air, a first inlet serving as a main air inlet is provided on the first oil guide plate, and a second inlet serving as an auxiliary air inlet is provided on the second oil guide plate.

[0019] In order to facilitate the formation of a space with a fast flow rate and a large dynamic pressure and to move the negative pressure area outward, an inner lining plate assembly is arranged in the shell and above the oil guide plate assembly. The inner lining plate assembly includes a front inner lining plate arranged above the front side of the first oil guide plate and side inner lining plates respectively arranged on the left and right sides of the shell. The space between the oil guide plate assembly, the inner lining plate assembly, the shell and the fan frame constitutes an inner cavity.

[0020] To facilitate stable driving of the lower panel assembly, the lower panel assembly includes a lower panel matching the air inlet, and the range hood also includes a motion mechanism for driving the lower panel assembly, the motion mechanism includes a support beam fixed in the shell, a first hinge, a second hinge, and a driving mechanism for driving the first hinge and / or the second hinge, the first hinge and the second hinge are respectively rotatably connected to the support beam, the rotation axes of the first hinge and the second hinge extend in the left and right directions respectively, the first hinge and the second hinge are respectively rotatably connected to the lower panel, and the connection between the first hinge and the lower panel is located above the connection between the second hinge and the lower panel.

[0021] Compared with the prior art, the advantages of the present invention are: by placing the air inlet downward, it is closer to the smoke source, and the negative pressure attenuation is less, which can greatly improve the smoking effect. After the panel is opened, it will not block the line of sight and is not easy to hit the head; the function buttons are placed on the movable lower panel, and the lower panel has a small inclination angle, which is basically 90 degrees to the line of sight, which is convenient for operation; the triangular lower panel assembly has a higher smoke collection effect, improves the negative pressure distribution, and accelerates the inhalation of oil smoke. On the premise of ensuring the smoking effect, the distance between the lower panel and the wall is appropriately reduced after it is opened, so as to solve the problems of blocking the line of sight and hitting the head; installing lighting lamps in the triangular area of ​​the lower panel assembly can avoid the problem of glare of light, and can also illuminate the entire stove surface, thereby improving the user's cooking experience; forming inner and outer cavities, so that the air intake speed is evenly distributed, thereby improving the smoking effect on both sides, and by setting auxiliary air inlets to draw the oil smoke, the oil smoke will not overflow during the rising process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a range hood in a closed state according to an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of the range hood in an open state according to an embodiment of the present invention;

[0024] Figure 3 is a side view of the range hood in an open state according to an embodiment of the present invention;

[0025] Figure 4 is a cross-sectional view (front-to-back cross-section) of the range hood in an open state according to an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of an alternative embodiment of an inner lining plate assembly of a range hood according to an embodiment of the present invention;

[0027] Figure 6 is a schematic diagram of a lighting lamp of a range hood according to an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of a baffle of a lower panel assembly of a range hood according to an embodiment of the present invention;

[0029] Figure 8 It is a partial schematic diagram of the range hood in the closed state according to the embodiment of the present invention;

[0030] Fig. 9 A sectional perspective view of the movement mechanism of the lower panel assembly of the range hood according to the embodiment of the present invention in a closed state;

[0031] Fig.10 A sectional side view of the movement mechanism of the lower panel assembly of the range hood according to the embodiment of the present invention in a closed state;

[0032] Fig.11 A side view of the movement mechanism of the lower panel assembly of the range hood according to the embodiment of the present invention in an open state;

[0033] Fig.12 It is a partial schematic diagram of a second connecting rod of the motion mechanism of the lower panel assembly of the range hood according to an embodiment of the present invention;

[0034] Fig.13 This is a partial schematic diagram of the lower panel assembly of the range hood according to an embodiment of the present invention in an open state. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0037] See also Figure 1 and Figure 2 A range hood is a side-suction range hood, comprising a shell 1, the front side of the shell 1 is open and gradually tilted backward from top to bottom, and an upper panel 2 and a lower panel assembly 3 are respectively arranged at the open part of the shell 1 from top to bottom. An air inlet 11 is formed at the front side of the shell 1 and at a position corresponding to the lower panel assembly 3, and the air inlet 11 is opened below the upper panel 2. The upper panel 2 and the shell 1 are fixedly arranged, while the lower panel assembly 3 can translate and rotate relative to the shell 1, so as to open or close the air inlet 11. The shell 1 also includes side panels 12 located on the left and right sides, and a top rear panel 13 arranged between the side panels 12, the top rear panel 13 includes a top panel and a rear panel, and the top panel and the rear panel can be integrated or can be a split structure connected together.

[0038] The range hood of the present invention has a dual-control switch structure. A power button 21 is provided on the upper panel 2, and a display icon is provided. For example, a ring-shaped yellow silk-screened circle 211 can be provided around the power button 21. When the range hood is turned off, the user can identify the position of the power button 21 according to the silk-screened circle 211.

[0039] See also Figure 2 to Figure 4The lower panel assembly 3 includes a lower panel 31, a first baffle 32, a second baffle 33 and a third baffle 34. The shape and size of the lower panel 31 correspond to the air inlet 11. The first baffle 32 extends from the bottom of the lower panel 31 into the housing 1. The second baffle 33 has two baffles, which are respectively arranged on both sides of the first baffle 33. The third baffle 33 is connected between the rear sides of the first baffle 32 and the second baffle 33. The first baffle 32, the second baffle 33 and the third baffle 34 form a cover body with a triangular longitudinal section, and are connected and fixed to the lower panel 31 so that the lower panel assembly 3 constitutes a relatively closed space. Function keys 35 are arranged on the lower panel 31, such as a switch key, a light, an air volume key, an air housekeeper, etc. In the off state, the icon of the function key 35 is hidden. When the area in the silk screen circle 211 is lightly touched, that is, the power button 21 is lightly touched, the range hood enters the working state; at the same time, the function key 35 on the lower panel 31 lights up, and the icon of the function key 35 begins to appear. In addition, after the power button 21 of the upper panel 2 is turned on, the lower panel assembly 3 is driven by its motion mechanism to gradually move upward and rotate, so that the air inlet 11 is opened and the range hood enters the range hood working state. When the lower panel assembly 3 reaches the open state, the lower panel 31 will be 15 to 20 degrees with the vertical direction, and the lower panel 31 will gradually tilt backward from top to bottom, which is conducive to the user to operate the function key 35. The inclination angle of the lower panel 31 is smaller than that of the upper panel 2. The specific structure and working principle of the above-mentioned lower panel assembly 3 and its motion mechanism will be described in detail below.

[0040] A fan frame 4 is arranged above the shell 1, and a fan system 6 is arranged inside the fan frame 4, thereby forming a range hood with a fan mounted on top. An oil guide plate assembly 7 is arranged inside the shell 1, and an oil cup 8 is arranged at the bottom of the shell 1. The oil guide plate assembly 7 includes a first oil guide plate 71 extending from the lower end of the upper panel 2 toward the inside of the shell 1, and preferably gradually tilting downward, and a second oil guide plate 72 extending downward from the rear end of the first oil guide plate 71, and preferably gradually tilting forward, and the lower end of the second oil guide plate 72 extends above the oil cup 8 to guide the oil droplets into the oil cup 8. The upper end of the oil cup 8 is open, and the front side of the oil cup 8 covers the bottom of the shell 1, so that all the oil droplets in the shell 1 can enter the oil cup 8. An oil leakage hole 16 is opened at the bottom of the shell 1, so that the oil droplets enter the oil cup 8 through the oil leakage hole 16.

[0041] The first oil guide plate 71 and the second oil guide plate 72 are preferably integrally formed. An inner lining plate assembly is provided in the housing 1, and is arranged above the oil guide plate assembly 7. The inner lining plate assembly includes a front inner lining plate 151 arranged above the front side of the first oil guide plate 71, and the front inner lining plate 151 preferably extends upward and gradually tilts forward from the upper part of the first oil guide plate 71 to the top of the housing 1 and is connected to the top rear plate 13 of the housing 1. More preferably, the front inner lining plate 151 is parallel to the upper panel 2. The inner lining plate assembly also includes side inner lining plates 152 respectively arranged on the inner sides of the left and right side panels 12 of the housing 1. The space between the oil guide plate assembly 7, the front inner lining plate 151, the side inner lining plate 152, the top rear plate 13 and the fan frame 4 constitutes an inner cavity 142. When the range hood is in the open state, the space between the oil guide plate assembly 7, the side panels 12 and the lower panel assembly 3 constitutes an outer cavity 141 for collecting smoke. The inner cavity 142 and the outer cavity 141 are both located below the fan system 6. The oil guiding function of the oil guide plate assembly 7 will be described in detail below.

[0042] When the range hood is closed, the first baffle 32, the second baffle 33 and the third baffle 34 of the lower panel assembly 3 are just placed in the outer cavity 141, and the upper panel 2 and the lower panel 31 form a whole large plane, which is the first position of the lower panel assembly 3. When the range hood is in operation and in the open state, the lower panel assembly 3 can move to the front of the upper panel 2 and open the air inlet 11, and a complete outer cavity 141 is formed, which is the second position of the lower panel assembly 3. The first oil guide plate 71 is provided with a first inlet 711, and the second oil guide plate 72 is provided with a second inlet 721, wherein the first inlet 711 is the main air inlet, and the second inlet 721 is the auxiliary air inlet. The outer cavity 141 can ensure that when the amount of frying oil smoke is large, the smoke can be quickly gathered and concentrated, and then sucked in from the first inlet 711 and the second inlet 721 on the oil guide plate assembly 7. After the oil smoke passes through the oil guide plate assembly 7 from the outer cavity 141, it enters the fan system 6 through the inner cavity 142 and is then discharged outdoors. Preferably, the first inlet 711 and the second inlet 721 are both strip-shaped holes, which are evenly spaced along the left and right directions, so that the first oil guide plate 71 and the second oil guide plate 72 become a grille.

[0043] As described above, the front inner lining plate 151 is tilted relative to the vertical direction and the horizontal direction. In this embodiment, preferably, the front inner lining plate 151 is 50° with the horizontal direction, and the tilted setting of the oil guide plate assembly 7 is combined to make the inner cavity 142 a roughly conical cavity. The front inner lining plate 151 can make the negative pressure in the inner cavity 142 move outward, and the corresponding inlets on the first oil guide plate 71 and the second oil guide plate 72 are evenly arranged, so that the negative pressure in the outer cavity 141 can be evenly moved outward through the oil guide plate assembly 7, and the outer cavity 141 becomes a pressure equalizing cavity. In addition, the air inlet speed of each inlet on the oil guide plate assembly 7 is uniform, and the oil smoke can enter the fan system 6 evenly. The outer cavity 141 is closer to the position where the cooking food oil smoke rises, and it is easier to capture the rising oil smoke and prevent the oil smoke from escaping, so that the user can truly experience smokeless cooking during the cooking process.

[0044] Because the negative pressure within the outer cavity 141 is evenly distributed, it is closer to the origin of the smoke generated by cooking, and the smoke on both sides will not overflow the outside of the range hood. After the smoke rises, it directly passes through the first inlet 711 (path L3), the second inlet 721 (path L2) in three directions, or enters the inner cavity 142 through the first inlet 711 (path L1) under the guidance of the lower panel assembly 3. By setting the second inlet 721 (auxiliary air inlet), the rising smoke can have a certain slope. The air inlet area S1 of the second inlet 721 is inversely proportional to the inclination angle of the rising smoke and the wind speed V1; the smaller S1 is, the higher V1 is, and the greater the inclination angle of the rising smoke is (within a certain range). The wind speed V2 of the smoke at the first inlet 711 reaches the highest, V2>V1, and most of the smoke is absorbed by it along the L3 path.

[0045] When the oil smoke with the fastest rising speed touches the bottom surface of the first baffle 32 of the lower panel assembly 3, it will diffuse. Due to the inclined design of the first baffle 32, the oil smoke will drift upward along the inclined surface. The wind speed V2 at the first inlet 711 is the highest. According to the Coanda wall effect principle, the oil smoke will drift toward the first inlet 711 along the top outer wall of the outer cavity 141, be gathered by the fan system 6 and then discharged outdoors, so that users can truly experience smokeless cooking during the cooking process.

[0046] Since the fan system 6 is placed upward, the noise generated during operation is reflected and diffused downward by the fan frame 4 and enters the conical inner cavity 142. Therefore, preferably, the front inner lining plate 151 is a noise reduction plate structure. Figure 5The lining plate assembly also includes a sound-absorbing cotton 153 arranged on the front side of the front lining plate 151. The front lining plate 151 is provided with a noise reduction hole 154. The front lining plate 15 and the sound-absorbing cotton 153 form a noise reduction structure, which can reflect the noise diffused downward in the fan frame 4, and the uniform arrangement of the first inlet 711 and the second inlet 721 of the oil guide plate assembly 7 can block the reflected noise again. According to the Bernoulli and fluid continuity principles, the inner cavity 142 is located below the fan system 6, the internal fluid flows fast, the dynamic pressure is large, and the static pressure is small. The static pressure in the equalizing cavity formed by the gas in the outer cavity 141 is the largest, the dynamic pressure is the smallest, the airflow is more stable, the flow loss is small, the air inlet fluid is more uniform, and the noise is lower.

[0047] See also Figure 4 , the angle between the first oil guide plate 71 of the oil guide plate assembly 7 and the horizontal direction is greater than 12°, preferably 20°, so that the oil droplets dripping from the fan frame 4 will not drip directly from the first oil guide plate 71, but will flow from the front end of the first oil guide plate 71 to the rear end. The lower end of the second oil guide plate 72 is connected to the front side of the shell 1, forming a sealing design, which can isolate the oil smoke from contacting the internal electrical components (such as the moving mechanism of the lower panel assembly 3) to avoid damage to the electrical components. A small amount of oil smoke will be in contact with the rising oil smoke at the connection point. Because the oil smoke in contact here is small, it takes a long period of uninterrupted use to generate oil droplets. After the lower panel assembly 3 is closed, it drips along the lower panel 31 toward the side of the shell 1 and is collected by the oil cup 8.

[0048] In addition, the lining plate assembly described above can also participate in the oil circuit design and play the role of guiding oil. The rear side of the side lining plate 152 is connected to the rear side of the top rear plate 13 of the shell 1, the tops of the front lining plate 151 and the side lining plate 152 are connected to the fan frame 4, and the bottoms of the front lining plate 151 and the side lining plate 152 are connected to the first oil guide plate 71 of the oil guide plate assembly 7, thereby forming a left and right positive conical trumpet-shaped and front and back inverted conical trumpet-shaped space. While guiding the oil smoke, the oil droplets condensed inside the side wall of the fan frame 4 can flow downward along the two side lining plates 152 into the bottom of the shell 1. The front and back inverted cones can make the oil droplets on the inner wall of the front side of the fan frame 4 flow downward along the oil guide plate 6 into the bottom of the shell 1. In addition, it can also isolate the oil smoke from contact with the moving mechanisms on the left and right sides of the inner lining assembly and components such as switches on the outside of the front inner lining, thereby preventing moving parts and electrical components such as switches from rusting and corroding due to long-term contact with corrosive liquids such as acids and alkalis in the oil smoke.

[0049] The top rear plate 13, oil guide plate assembly 7, side inner lining plate 152, front inner lining plate 151, and fan frame 4 constitute an internal oil guide structure, which is a hidden structure that takes into account both manufacturability and operability, and is used to collect and isolate oil smoke to prevent oil smoke from contacting electrical components and causing damage. The oil guide plate assembly 7, side inner lining plate 152, and lower panel 31 constitute an external oil guide structure that takes into account the appearance of the entire machine and the lifting and opening scheme of the lower panel assembly 3, and is used to collect the rising oil smoke during cooking and enter the interior of the range hood. Oil smoke will condense and produce oil droplets when passing through the surfaces of the various components of the range hood, and the internal and external oil droplets will drip and flow into the oil cup 8 through the guidance of the inner cavity 142 and the outer cavity 141.

[0050] When the range hood is turned on and in working state, there is a certain gap between the lower panel assembly 3 and the upper panel 2, and the first baffle 32 of the lower panel assembly 3 gradually extends from front to back to form a guide structure, which can quickly guide the oil smoke below the lower panel assembly 3 into the outer cavity 141 on the front side of the oil guide plate assembly 7. Preferably, in order to obtain a better guide effect, the first baffle 32 gradually extends upward from front to back. In order to ensure the best smoke collection effect and user experience, when the range hood is installed on the wall, the distance between the bottom of the lower panel 31 and the wall is 360-380 mm.

[0051] A lighting lamp 36 can be arranged at the first baffle plate 32 of the lower panel assembly 3. Installing the lighting lamp 36 in this area avoids the glare problem caused by direct light to the user, and can also illuminate the entire stove surface under the range hood, thereby improving the user's cooking experience. Figure 6 and Figure 7 The lighting lamp 36 is an LED lamp. A lamp slot 321 is provided on the first baffle plate 32. The lighting lamp 36 is clamped in the lamp slot 321. When the range hood is in working state, the light of the lighting lamp 36 irradiates downward.

[0052] In this embodiment, a snap ring 361 is preferably provided on the side of the illuminating lamp 36 facing the inside of the lower panel assembly 3, and two snap rings 361 are arranged at intervals on the left and right of each illuminating lamp 36, and each snap ring 361 is fixed to the illuminating lamp 36 by a screw 362. Preferably, the snap ring 361 is a metal elastic snap ring. The following description is based on the position of the range hood in the open state. Each snap ring 361 passes from the illuminating lamp 36 to the side of the lower panel assembly 3 in the front-to-back direction. The lamp groove 321 is provided with a snap groove 322 at the position corresponding to the front and rear sides of the illuminating lamp 36. When installing the illuminating lamp 36, the front and rear ends of each snap ring 361 are squeezed so as to engage with the snap groove 322 at the corresponding position respectively. After being installed in place, the snap ring 361 and the snap groove 322 squeeze each other to fix the illuminating lamp 36, so that the illuminating lamp 36 is detachably connected to the lower panel assembly 3.

[0053] See also Figure 8 to Figure 13In order to facilitate the automatic driving of the lower panel assembly 3, a motion mechanism is provided on the side of the lower panel assembly 3 facing the inside of the shell 1, including a support beam 371 fixed in the shell 1, a drive mechanism 372, a first hinge 373, a second hinge 374, a first connecting rod 375 and a second connecting rod 376. The two ends of the support beam 371 are respectively connected and fixed to the upper panel 2 and the rear plate of the top rear plate 13 of the shell 1. The support beam 371 can support the weight of the lower panel assembly 3, is the interface of each rod member that controls the motion trajectory of the lower panel assembly 3, connects the top rear plate 13 of the shell 1 and the upper panel 2, enhances the rigidity of the shell 1, and improves the ability to resist falling during transportation.

[0054] The first hinge 373 is in a bent shape, preferably, in a roughly V-shaped shape, with the opening facing forward. One end of the first hinge 373 is hinged to the front end of the support beam 371 (the hinge is the rotation center of the first hinge 373), and the other end is hinged to the lower panel 31 through the panel bracket 312, wherein the panel bracket 312 is fixedly arranged on the side of the lower panel 31 facing the inside of the housing 1. The second hinge 374 can be in a long strip shape, one end of which is hinged to the support beam 371 (the hinge is the rotation center of the second hinge 374), and the other end is hinged to the lower panel 31 through the panel bracket 312. The connection between the first hinge 373 and the panel bracket 312 is located above the connection between the second hinge 374 and the panel bracket 312. Optionally, the first hinge 373 and the second hinge 374 can also be connected to the lower panel 31 through two independent panel brackets 312. The second hinge 374 is a driving arm, and the first hinge 373 is a driven arm. The rotation axes of the hinged joints of the first hinge 373, the second hinge 374, the second connecting rod 376 and the first connecting rod 375 are all extended in the left-right direction. The second connecting rod 376 is preferably in an arc shape protruding upward, one end of which is hinged to the second hinge 374, such as being hinged at the middle position of the second hinge 374, and the other end is hinged to one end of the first connecting rod 375. The other end of the first connecting rod 375 is connected to the output end of the driving mechanism 372, and is driven by the driving mechanism 372 to rotate around the connection with the driving mechanism 372.

[0055] There are two motion mechanisms, the one with the driving mechanism 372 is the active end, and the motion mechanism as the driven end does not need to be provided with the driving mechanism 372. At this time, the first connecting rod 375 of the motion mechanism is connected to the output end of the driving mechanism 372 of the other motion mechanism through the connecting shaft 377 to transmit torque. The connecting shaft 377 extends in the left and right directions so that the motion mechanisms on both sides of the lower panel 31 can move synchronously and can be opened and closed smoothly. Based on space considerations, by setting a connecting rod mechanism composed of the first connecting rod 375 and the second connecting rod 376, the load rotation center (the rotation center where the connecting shaft 377 is located) is transferred to a position close to the lower panel 31, so that it can be easily installed.

[0056] Preferably, the driving mechanism 372 is an electric push rod, which can increase the self-locking force of the motion mechanism. A fixed bracket 3712 is provided on the support beam 371, and one end of the first hinge 373 is hinged to the fixed bracket 3712 at a position above the support beam 371. Both ends of the connecting shaft 377 are rotatably connected to the upper panel 2 through the bearing seat 3771. Alternatively, the driving mechanism 372 can also be a motor, which is connected to the first connecting rod 375 through the output shaft of the reduction mechanism (which can also be the output shaft of the motor).

[0057] The output end of the electric push rod is connected to a third connecting rod 3723, one end of the third connecting rod 3723 is rotatably connected to the output end of the electric push rod, and the other end is sleeved on the outer periphery of the connecting shaft 377 and connected and fixed, one end of the first connecting rod 375 is sleeved on the outer periphery of the connecting shaft 377 and connected and fixed, and the other end is still rotatably connected to the second connecting rod 376. When the electric push rod is started, the connecting shaft 377 is driven to rotate by the third connecting rod 3723, thereby driving the first connecting rod 375 to rotate. The second hinge 374, the panel bracket 312, the first hinge 373, the support beam 371 and the fixed bracket 3712 form a four-bar structure. When the second hinge 374 is driven by the second connecting rod 376, it can drive the lower panel 31 to move.

[0058] The two rotation pairs (and the first hinge) of the second link 376 can be distributed above and below the support beam 371 , or can be both located above the support beam 371 .

[0059] When the electric push rod drives the lower panel 31 to close, a large pulling force needs to be output. At this time, the top rear plate 13 is easily deformed by pulling. However, in this embodiment, due to the addition of the support beam 371 in this area, the rigidity of the connection between the support beam 371 and the top rear plate 13 is greatly improved, and deformation will no longer occur.

[0060] By setting the first hinge 373 and the second hinge 374, the movement trajectories of the upper and lower hinge points of the lower panel 31 are controlled respectively, so that the lower panel 31 can achieve a composite movement of translation and rotation. Since the double hinge structure itself has a large amount of shaking, there are two active points at the non-driving end, which cannot move synchronously, so a connecting shaft 377 is added to realize the transmission of torque and increase the synchronization of the movement of the left and right sides.

[0061] See also Figure 1 , Figure 8 and Fig.10 When the lower panel assembly 3 is in the closed state, the angle α between the first connecting rod 375 and the second connecting rod 376 is close to the dead-point angle. At this time, the lower panel 31 of the lower panel assembly 3 is flush with the upper panel 2 to form a large plane; see Fig.13 , the movement mechanism is opened, the lower panel assembly 3 first moves forward and then upward, and rotates counterclockwise at the same time; see Figure 3 , Fig.11When the lower panel assembly 3 moves to the fully open state, it is in front of the upper panel 2. At this time, the angle β between the first connecting rod 375 and the second connecting rod 376 is close to the dead point angle, thereby improving the transmission efficiency. In this embodiment, the angle between the first connecting rod 375 and the second connecting rod 376 refers to the angle between the connecting line (chord) at both ends of the second connecting rod 376 and the center line of the first connecting rod 375. The angle of movement of the connecting rod determines the position of the lower panel 31 when it is opened and closed. A limit shaft 3711 is provided on the support beam 371, corresponding to the position below the first connecting rod 375, for limiting the movement of the first connecting rod 375 when closing, to prevent it from crossing the dead point and causing failure of the connecting rod mechanism. See. Fig. 9 and 12 The end portion where the first link 375 and the second link 376 are connected is recessed in a direction away from the second link 376 to form a movement groove 3751, which is used to limit the movement angle of the second link 376 by the depth h of the movement groove 3751 when the lower panel assembly 3 is opened.

Claims

1. A range hood, comprising a housing (1), an upper panel (2) fixedly arranged on the front side of the housing (1), and a lower panel assembly (3) movably arranged on the front side of the housing (1), characterized in that: An air inlet (11) is formed on the front side of the shell (1) and below the upper panel (2); the lower panel assembly (3) can be in a first position and a second position reached from the first position by translation and rotation; when the lower panel assembly (3) is in the first position, the air inlet (11) is closed by the lower panel assembly (3); and when the lower panel assembly (3) is in the second position, the air inlet (11) is opened; A fan frame (4) is arranged above the shell (1), a fan system (6) is arranged inside the fan frame (4), and when the lower panel assembly (3) is in the second position, it is located in front of the shell (1); an oil guide plate assembly (7) is arranged inside the shell (1) for allowing oil smoke entering from the air inlet (11) to pass through, and the oil guide plate assembly (7) comprises a first oil guide plate (71) extending backward from the front side of the shell (1) and located above the air inlet (11), and a second oil guide plate (72) extending downward from the rear end of the first oil guide plate (71); when the lower panel assembly (3) is in the second position, the space between the oil guide plate assembly (7), the shell (1) and the lower panel assembly (3) constitutes an outer cavity (141) for collecting smoke; The lower panel assembly (3) comprises a lower panel (31) matched with the air inlet (11) and a first baffle (32); when the lower panel assembly (3) is in the second position, the lower panel assembly (3) is located at the front side of the upper panel (2); the first baffle (32) extends from the lower end of the lower panel (31) toward the inside of the shell (1) in the direction of the inside of the shell (1); the first baffle (32) extends from the lower end of the lower panel (31) toward the inside of the shell (1) in the direction of the inside of the shell (1) gradually tilting upward from front to back; The range hood further comprises a movement mechanism for driving the lower panel assembly (3), the movement mechanism comprising a support beam (371) fixed in the housing (1), a first hinge (373), a second hinge (374) and a driving mechanism (372) for driving the first hinge (373) and / or the second hinge (374), the first hinge (373) and the second hinge (374) being respectively rotatably connected to the support beam (371), the rotation axes of the first hinge (373) and the second hinge (374) extending in the left and right directions respectively, the first hinge (373) and the second hinge (374) being respectively rotatably connected to the lower panel (31), and the connection between the first hinge (373) and the lower panel (31) is located above the connection between the second hinge (374) and the lower panel (31).

2. The range hood according to claim 1, characterized in that: The upper panel (2) is provided with a power key (21), and the lower panel assembly (3) is provided with a function key (35), thereby forming a double-control switch structure.

3. The range hood according to claim 1, characterized in that: The first baffle (32) is provided with an illumination lamp (36).

4. The range hood according to claim 1, characterized in that: The first oil guide plate (71) is provided with a first inlet (711) serving as a main air inlet, and the second oil guide plate (72) is provided with a second inlet (721) serving as an auxiliary air inlet.

5. The range hood according to claim 1, characterized in that: An inner lining plate assembly is arranged inside the shell (1) and above the oil guide plate assembly (7), the inner lining plate assembly comprising a front inner lining plate (151) arranged above the front side of the first oil guide plate (71), and side inner lining plates (152) respectively arranged on the left and right sides of the shell (1), and the space between the oil guide plate assembly (7), the inner lining plate assembly, the shell (1) and the fan frame (4) constitutes an inner cavity (142).

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